WO2009132254A1 - Commandes réparties pour machine de rétreinte de canette à plusieurs étages - Google Patents
Commandes réparties pour machine de rétreinte de canette à plusieurs étages Download PDFInfo
- Publication number
- WO2009132254A1 WO2009132254A1 PCT/US2009/041635 US2009041635W WO2009132254A1 WO 2009132254 A1 WO2009132254 A1 WO 2009132254A1 US 2009041635 W US2009041635 W US 2009041635W WO 2009132254 A1 WO2009132254 A1 WO 2009132254A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stage
- necking
- gears
- necking machine
- shaft
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
- B21D51/2692—Manipulating, e.g. feeding and positioning devices; Control systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
- B21D51/2615—Edge treatment of cans or tins
Definitions
- the present technology relates to a manufacturing machine having distributed drives. More particularly, the present technology relates to a multi-stage can necking machine having distributed drives.
- Metal beverage cans are designed and manufactured to withstand high internal pressure - typically 90 or 100 psi.
- Can bodies are commonly formed from a metal blank that is first drawn into a cup. The bottom of the cup is formed into a dome and a standing ring, and the sides of the cup are ironed to a desired can wall thickness and height. After the can is filled, a can end is placed onto the open can end and affixed with a seaming process.
- Cans may be necked in a "spin necking” process in which cans are rotated with rollers that reduce the diameter of the neck.
- Most cans are necked in a "die necking” process in which cans are longitudinally pushed into dies to gently reduce the neck diameter over several stages. For example, reducing the diameter of a can neck from a conventional body diameter of 2 -11/16 th inches to 2-6/16 th inches (that is, from a 211 to a 206 size) often requires multiple stages, often 14.
- Each of the necking stages typically includes a main turret shaft that carries a starwheel for holding the can bodies, a die assembly that includes the tooling for reducing the diameter of the open end of the can, and a pusher ram to push the can into the die tooling.
- Each necking stage also typically includes a transfer starwheel shaft that carries a starwheel to transfer cans between turret starwheels.
- the starwheel shafts and the main turret shafts each include a gear, wherein the gears of each shaft are in meshed communication to form a continuous gear train.
- a single motor is used to provide the torque required to drive the entire gear train at high speeds.
- An emergency stop put a high torque load on the gear teeth compared with normal operation. Start up conditions may also create relatively high torque load on some gear teeth.
- a multi-stage can necking machine may have distributed drives.
- Such a multistage can necking machine may include a plural of operation stages, wherein at least some of the operation stages may be configured for can necking operations.
- Each operation stage may include a main turret shaft, a transfer starwheel shaft, and a support for mounting the main turret shaft and transfer starwheel shaft.
- Each main turret shaft and transfer starwheel shaft may have a gear, and the gears of the operation stages may be in meshed communication to form a continuous gear train.
- a plural of motors may be distributed among the operation stages and mechanically coupled to the gear train, wherein each one of the motors may be capable of transmitting power to the gear train.
- the multi-stage can necking machine may not require an oil bath for the gears that drive the shafts to properly operate.
- the multi-stage can necking machine may have some gears made of a composite material. Because the gears are made of a composite material, and not steel, they do not have to operate within an oil bath. Furthermore, certain composites may be used that expand when they heat up to thereby help reduce backlash between adjacent gears.
- the multi-stage can necking machine may be configured to provide easy access to the gears.
- the multi-stage can necking machine may be configured such that each shaft may extend through a respective support so that the gears may be exterior to the supports.
- FIG. 1 is a perspective view depicting a multi-stage can necking machine
- FIG. 2 is a perspective view depicting a necking station and gear mounted on a main turret shaft of the multi-stage necking machine shown in FIG. 1, with surrounding and supporting parts removed for clarity;
- FIG. 3 is a perspective view depicting a transfer starwheel and gear mounted on a starwheel shaft of the multi-stage necking machine shown in FIG. 1, with surrounding and supporting parts removed for clarity;
- FIG. 4 is a partial expanded view depicting a section of the multi-stage can necking machine shown in FIG. 1;
- FIG. 5 is a perspective view depicting a back side of a multi-stage can necking machine having distributed drives
- FIG. 6 is a schematic illustrating a machine having distributed drives; and [0017] FIG. 7 is a partial expanded view depicting gear teeth from adjacent gears engaging each other.
- a preferred configuration for driving a multi-stage can necking machine is provided.
- the multi-stage can necking machine incorporates technology that overcomes the many shortcomings of known multi-stage can necking machines.
- the present invention is not limited to the disclosed configuration, but rather encompasses use of the technology disclosed, in any manufacturing application according to the language of the claims.
- a multi-stage can necking machine 10 may include several necking stages 14. Each necking stage 14 includes a necking station 18 and a transfer starwheel 22. Each one of the necking stations 18 is adapted to incrementally reduce the diameter of an open end of a can body, and the transfer starwheels 22 are adapted to transfer the can body between adjacent necking stations 18, and optionally at the inlet and outlet of necking machine 10.
- Conventional multi-stage can necking machines in general, include an input station and a waxer station at an inlet of the necking stages, and optionally include a bottom reforming station, a flanging station, and a light testing station positioned at an outlet of the necking stages.
- multi-stage can necking machine 10 may include in addition to necking stages 14, other operation stages such as an input station, a bottom reforming station, a flanging station, and a light testing station as in conventional multi-stage can necking machines (not shown).
- operation stage or “operation station” and its derivatives is used herein to encompass the necking station 14, bottom reforming station, a flanging station, and a light testing station, and the like.
- FIG. 2 is a detailed view depicting operative parts of one of the necking stations 18.
- each necking station 18 includes a main turret 26, a set of pusher rams 30, and a set of dies 34.
- the main turret 26, the pusher rams 30, and the dies 34 are each mounted on a main turret shaft 38.
- the main turret 26 has a plurality of pockets 42 formed therein. Each pocket 42 has a pusher ram 30 on one side of the pocket 42 and a corresponding die 34 on the other side of the pocket 42.
- each pocket 42 is adapted to receive a can body and securely holds the can body in place by mechanical means, such as by the action pusher ram and the punch and die assembly, and compressed air, as is understood in the art.
- the open end of the can body is brought into contact with the die 34 by the pusher ram 30 as the pocket on main turret 26 carries the can body through an arc along a top portion of the necking station 18.
- Die 34 in transverse cross section, is typically designed to have a lower cylindrical surface with a dimension capable of receiving the can body, a curved transition zone, and a reduced diameter upper cylindrical surface above the transition zone.
- the can body is moved up into die 34 such that the open end of the can body is placed into touching contact with the transition zone of die 34.
- the upper region of the can body is forced past the transition zone into a snug position between the inner reduced diameter surface of die 34 and a form control member or sleeve located at the lower portion of pusher ram 30.
- the diameter of the upper region of the can is thereby given a reduced dimension by die 34.
- a curvature is formed in the can wall corresponding to the surface configuration of the transition zone of die 34. The can is then ejected out of die 34 and transferred to an adjacent transfer starwheel.
- a main turret gear 46 (shown schematically in FIG. 2 without teeth) is mounted proximate to an end of shaft 38.
- the gear 46 may be made of suitable material, and preferably is steel.
- a plate 50 may be mounted near the end of shaft 38 but on the to the gear 46.
- the plate 50 may help ensure that the shaft 38 does not move within a support.
- FIG. 1 depicts each shaft 38 mounted in a respective support 52.
- each starwheel 22 may be mounted on a shaft 54, and may include several pockets 58 formed therein.
- the starwheels 22 may have any amount of pockets 58.
- each starwheel 22 may include twelve pockets 58 or even eighteen pockets 58, depending on the particular application and goals of the machine design.
- Each pocket 58 is adapted to receive a can body and retains the can body using a vacuum force. The vacuum force should be strong enough to retain the can body as the starwheel 22 carries the can body through an arc along a bottom of the starwheel 22.
- gear 62 (shown schematically in FIG. 3 without teeth) is mounted proximate to an end of the shaft 54.
- Gear 62 may be made of steel but preferably is made of a composite material.
- each gear 62 may be made of any conventional material, such as a reinforced plastic, such as Nylon 12.
- a horizontal structural support 66 supports transfer shaft 54.
- Support 66 includes a flange at the rear end (that is, to the right of Figure 3) for bolting to an upright support of the base of machine 10 and includes a bearing (not shown in FIG. 3) near the front end inboard of the transfer starwheel 22.
- transfer starwheel shaft 54 is supported by a rear end bearing that preferably is bolted to upright support 52 and a front end bearing that is supported by horizontal support 66, which itself is cantilevered from upright support 52.
- the base and upright support 52 is a unitary structure for each operation stage.
- FIG. 4 illustrates a can body 72 exiting a necking stage and about to transfer to a transfer starwheel 22.
- main turret 26 of the necking station 18a deposits the can body into a pocket 58 of the transfer starwheel 22.
- the pocket 58 then retains the can body 72 using a vacuum force that is induced into pocket 58 from the vacuum system described in co-pending application (Attorney Docket Number CC-5163), which is incorporated herein by reference in its entirety, carries the can body 72 through an arc over the bottommost portion of starwheel 22, and deposits the can body 72 into one of the pockets 42 of the main turret 26 of an adjacent necking station 18b.
- the necking station 18b further reduces the diameter of the end of the can body 72 in a manner substantially identical to that noted above.
- Machine 10 may be configured with any number of necking stations 18, depending on the original and final neck diameters, material and thickness of can 72, and like parameters, as understood by persons familiar with can necking technology.
- multistage can necking machine 10 illustrated in the figures includes eight stages 14, and each stage incrementally reduces the diameter of the open end of the can body 72 as described above.
- gears 46 and 62 are exterior to the supports 52.
- a cover (not shown) for preventing accidental personnel contact with gears 46 and 62, may be located over gears 46 and 62.
- the gears 46 and 62 are in mesh communication to form a continuous gear train.
- the gears 46 and 62 preferably are positioned relative to each other to define a zig-zag or saw tooth configuration.
- the main gears 46 are engaged with the transfer starwheel gears 62 such that lines through the main gear 46 center and the centers of opposing transfer starwheel gears 62 form an included angle of less than 170 degrees, preferably approximately 120 degrees, thereby increasing the angular range available for necking the can body.
- the transfer starwheels 22 have centerlines below the centerlines of main turrets 26, the operative portion of the main turret 26 (that is, the arc through which the can passes during which the necking or other operation can be performed) is greater than 180 degrees on the main turret 26, which for a given rotational speed provides the can with greater time in the operative zone.
- the operative zone has an angle (defined by the orientation of the centers of shafts 38 and 54) greater than about 225 degrees, and even more preferably, the angle is greater than 240 degrees, as described in co-pending application U.S. Serial No. 12/109,176 (Attorney Docket Number CC-5167).
- the greater the angle that defines the operative zone the greater the angular range available for necking the can body.
- the multi-stage can necking machine 10 may include several motors 74 to drive the gears 46 and 62 of each necking stage 14. As shown, there preferably is one motor 74 per every four necking stages 14. Each motor 74 is coupled to and drives a first gear 80 by way of a gear box 82. The motor driven gears 80 then drive the remaining gears of the gear train. By using multiple motors 74, the torque required to drive the entire gear train can be distributed throughout the gears, as opposed to prior art necking machines that use a single motor to drive the entire gear train. In the prior art gear train that is driven by a single gear, the gear teeth must be sized according to the maximum stress.
- gears closest to the prior art drive gearbox must transmit torque to the entire gear train (or where the single drive is located near the center on the stages, must transmit torque to about half the gear train), the maximum load on prior art gear teeth is higher than the maximum tooth load of the distributed gearboxes according to the present invention.
- the importance in this difference in tooth loads is amplified upon considering that the maximum loads often occur in emergency stop situations.
- a benefit of the lower load or torque transmission of gears 46 and 62 compared with that of the prior art is that the gears can be more readily and economically formed of a reinforced thermoplastic or composite, as described above.
- Lubrication of the synthetic gears can be achieved with heavy grease or like synthetic viscous lubricant, as will be understood by persons familiar with lubrication of gears of necking or other machines, even when every other gear is steel as in the presently illustrated embodiment. Accordingly, the gears are not required to be enclosed in an oil-tight chamber or operate in an oil bath, but rather merely require a minimal protection against accidental personnel contact
- Each motor 74 is driven by a separate inverter which supplies the motors 74 with current.
- the frequency of the inverter output is altered, typically between zero to 50 (or 60 hertz). For example, if the motors 74 are to be driven at half speed (that is, half the rotational speed corresponding to half the maximum or rated throughput) they would be supplied with 25 Hz (or 30 Hz).
- each motor inverter is set at a different frequency.
- a second motor 88 may have a frequency that is approximately 0.02 Hz greater than the frequency of a first motor 92
- a third motor 96 may have a frequency that is approximately 0.02 Hz greater than the frequency of the second motor 88. It should be understood that the increment of 0.02 Hz may be variable, however, it will be by a small percentage (in this case less than 1%).
- the downstream motors preferably are preferably controlled to operate at a slightly higher speed to maintain contact between the driving gear teeth and the driven gear teeth throughout the gear train. Even a small freewheeling effect in which a driven gear loses contact with its driving gear could introduce a variation in rotational speed in the gear or misalignment as the gear during operation would not be in its designed position during its rotation. Because the operating turrets are attached to the gear train, variations in rotational speed could produce misalignment as a can 72 is passed between starwheel pockets and variability in the necking process.
Abstract
La présente invention se rapporte à une machine de rétreinte de canette à plusieurs étages (10) comportant des commandes réparties. La machine de rétreinte de canette à plusieurs étages peut comprendre plusieurs étages d’action (14), au moins certains des étages d’action pouvant être conçus pour des actions de rétreinte de canette. Chaque étage d’action peut comprendre un arbre de barillet principal (38), un arbre de roue en étoile de transfert (54), et un support (52) servant à monter l’arbre de barillet principal et l’arbre de roue en étoile de transfert. Chaque arbre de barillet principal et arbre de roue en étoile de transfert peut comporter un engrenage (46, 62), et les engrenages des étages d’action peuvent se trouver en communication en prise pour former un train d’engrenages continu. Plusieurs moteurs (74) peuvent être répartis entre les étages d’action et mécaniquement accouplés au train d’engrenages, chacun des moteurs pouvant transmettre l’énergie au train d’engrenages.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/109,058 | 2008-04-24 | ||
US12/109,058 US8464567B2 (en) | 2008-04-24 | 2008-04-24 | Distributed drives for a multi-stage can necking machine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009132254A1 true WO2009132254A1 (fr) | 2009-10-29 |
Family
ID=40823359
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2009/041635 WO2009132254A1 (fr) | 2008-04-24 | 2009-04-24 | Commandes réparties pour machine de rétreinte de canette à plusieurs étages |
Country Status (2)
Country | Link |
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US (1) | US8464567B2 (fr) |
WO (1) | WO2009132254A1 (fr) |
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US10934104B2 (en) | 2018-05-11 | 2021-03-02 | Stolle Machinery Company, Llc | Infeed assembly quick change features |
US11097333B2 (en) | 2018-05-11 | 2021-08-24 | Stolle Machinery Company, Llc | Process shaft tooling assembly |
US11117180B2 (en) | 2018-05-11 | 2021-09-14 | Stolle Machinery Company, Llc | Quick change tooling assembly |
US11208271B2 (en) | 2018-05-11 | 2021-12-28 | Stolle Machinery Company, Llc | Quick change transfer assembly |
US11370015B2 (en) | 2018-05-11 | 2022-06-28 | Stolle Machinery Company, Llc | Drive assembly |
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US11534817B2 (en) | 2018-05-11 | 2022-12-27 | Stolle Machinery Company, Llc | Infeed assembly full inspection assembly |
US11565303B2 (en) | 2018-05-11 | 2023-01-31 | Stolle Machinery Company, Llc | Rotary manifold |
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US8601843B2 (en) | 2008-04-24 | 2013-12-10 | Crown Packaging Technology, Inc. | High speed necking configuration |
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US20220364639A1 (en) * | 2021-05-13 | 2022-11-17 | Stolle Machinery Company, Llc | Drive assembly |
US11786956B2 (en) | 2021-05-14 | 2023-10-17 | Stolle Machinery Company, Llc | System and method for automated low-speed positioning of a can necking machine |
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US11117180B2 (en) | 2018-05-11 | 2021-09-14 | Stolle Machinery Company, Llc | Quick change tooling assembly |
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EP3790821A4 (fr) * | 2018-05-11 | 2022-01-26 | Stolle Machinery Company, LLC | Éléments à changement rapide d'ensemble d'alimentation |
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FR3137002A1 (fr) * | 2022-06-28 | 2023-12-29 | Clement Sas | Module de reemboutissage profond d’embouts metalliques, et machine comprenant au moins un module |
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